At the moment, there are many FF-impulses in the air. I have tried to analyze the potential reasons to move towards FF from my present hardware. I own at the moment Nex-5 and 7, Nikon D7000 and Panasonic DMC-FX700 (true pocket size). So what would the main arguments be moving to FF-system like Nikon D800?

++ high resolution 36 mp vs. 16 (D7000), 24 (NEX-7)
+ the whole capacity of the FF-lenses can be exploited
+
- focal length without coefficients: good in wide angle, bad in tele area
+ in close-ups and macros: additional quality

The other poins are:

neg because of the mirror, serial shooting is slow, main finder does not work with videos
neg heavy
pos most of my existing Nikon objectives work, some in DX mode
neg Nikon D800 gives 15mp files in DX-mode, NEX gives 24mp

My personal judgement at the moment is that there is no reason for me to move to FF.